150 results found
    1. Evolutionary Biology
    2. Plant Biology

    Ascorbate Biosynthesis: A cross-kingdom history

    Alisdair R Fernie, Takayuki Tohge
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    1. Evolutionary Biology
    2. Plant Biology

    Evolution of alternative biosynthetic pathways for vitamin C following plastid acquisition in photosynthetic eukaryotes

    Glen Wheeler et al.
    Genomic evidence suggests that L-gulonolactone oxidase-the terminal enzyme in vitamin C synthesis, which has been repeatedly lost throughout animal evolution-was lost in plants and other photosynthetic eukaryotes following plastid acquisition.
    1. Plant Biology

    A chloroplast retrograde signal, 3’-phosphoadenosine 5’-phosphate, acts as a secondary messenger in abscisic acid signaling in stomatal closure and germination

    Wannarat Pornsiriwong et al.
    Molecular signals from chloroplasts can synergistically interact with the plant hormone, abscisic acid (ABA), to regulate non-canonical signaling pathways mediating fundamental cellular processes including stomatal closure, seed dormancy and germination.
    1. Neuroscience

    MEF2C regulates cortical inhibitory and excitatory synapses and behaviors relevant to neurodevelopmental disorders

    Adam J Harrington et al.
    Mice that lack the autism- and schizophrenia-linked gene MEF2C in cortical neurons have an imbalance of excitatory and inhibitory synapses, and impaired social and cognitive abilities.
    1. Neuroscience

    Constitutive activation of kappa opioid receptors at ventral tegmental area inhibitory synapses following acute stress

    Abigail M Polter et al.
    Rats exposed to a single stressful event experience days-long constitutive activation of the kappa opioid receptor at inhibitory synapses in part of the brain’s reward system, which increases their drug-seeking behavior.
    1. Neuroscience

    Pauses in cholinergic interneuron firing exert an inhibitory control on striatal output in vivo

    Stefano Zucca et al.
    Optogenetics and in vivo recordings in mice reveal that pauses in cholinergic interneurons offer an alternative mechanism to inhibit subthreshold and suprathreshold events of spiny projection neurons.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Live-cell mapping of organelle-associated RNAs via proximity biotinylation combined with protein-RNA crosslinking

    Pornchai Kaewsapsak et al.
    Live-cell nanometer-resolution RNA labeling method enables transcriptome-wide mapping of endogenous RNAs in nuclear, cytosol, ER, and mitochondrial subcompartments.
    1. Developmental Biology

    Revised roles of ISL1 in a hES cell-based model of human heart chamber specification

    Roberto Quaranta et al.
    Loss and gain-of-function investigation uncovers a regulatory network controlling human heart chamber specification in which the cardiac precursor gene ISL1 accelerates ventricular induction and antagonizes retinoic acid-driven atrial commitment.
    1. Human Biology and Medicine
    2. Neuroscience

    Unique membrane properties and enhanced signal processing in human neocortical neurons

    Guy Eyal et al.
    Models and experiments reveal that human L2/3 pyramidal neurons have distinctively low specific membrane capacitance which might have a significant impact on signal processing in human neocortex.
    1. Neuroscience

    Recruitment of inhibition and excitation across mouse visual cortex depends on the hierarchy of interconnecting areas

    Rinaldo David D'Souza et al.
    The relative recruitment of excitatory and inhibitory neurons by cortico-cortical interareal pathways depends on the hierarchy of areas and the laminar location of the neurons.

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